Probability distributions of smeared quantum stress tensors

We obtain in closed form the probability distribution for individual measurements of the stress-energy tensor of two-dimensional conformal field theory in the vacuum state, smeared in time against a Gaussian test function. The result is a shifted Gamma distribution with the shift given by the previously known optimal quantum inequality bound. For small values of the central charge it is overwhelmingly likely that individual measurements of the sampled energy density in the vacuum give negative results. For the case of a single massless scalar field, the probability of finding a negative value is 84%. We also report on computations for four-dimensional massless scalar fields showing that the probability distribution of the smeared square field is also a shifted Gamma distribution, but that the distribution of the energy density is not.Comment: 9 pages, 1 figure. Minor edits implemente

Nickel hydrogen low Earth orbit test program update and status

The current status of nickel-hydrogen (NiH2) testing ongong at NWSC, Crane In, and The Aerospace Corporation, El Segundo, Ca are described. The objective of this testing is to develop a database for NiH2 battery use in Low Earth Orbit (LEO) and support applications in Medium Altitude Orbit (MAO). Individual pressure vessel-type cells are being tested. A minimum of 200 cells (3.5 in diameter and 4.5 in diameter) are included in the test, from four U.S. vendors. As of this date (Nov. 18, 1986) approximately 60 cells have completed preliminary testing (acceptance, characterization, and environmental testing) and have gone into life cycling

Níveis críticos de fósforo para o estabelecimento de gramíneas forrageiras em Latossolo vermelho amarelo, Álico: II. Experimento de campo.

O objetivo do trabalho foi determinar os níveis criticos de (P) são solo pelos extratores de Mehlich I e Resina e na planta

Níveis criticos de fósforo para o estabelecimento de gramíneas forrageiras em Latossolo vermelho-amarelo, Álico: I: Ensaio em casa de vegetação.

Determinar níveis críticos de P no solo, avaliados pelos extratores de Mehlich I e Resina e na planta, para o estabelecimento das gramineas Brachiaria decumbens Stapf., Brachiaria brizantha Stapf. cv. Marandu e Panicum maximum Jacq., em Latossolo vermelho amarelo, Alico

Disponibilidade de fósforo pelos extratores de Mehlich 1 e resina em latossolo vermelho amarelo, álico cultivado com três gramíneas forrageiras.

Comparação dos extratores de mehlich 1 e resina na avaliação do P disponível em latossolo vermelho amarelo, alico cultivado com gramineas brachiaria decumbens

The embedding structure and the shift operator of the U(1) lattice current algebra

The structure of block-spin embeddings of the U(1) lattice current algebra is described. For an odd number of lattice sites, the inner realizations of the shift automorphism areclassified. We present a particular inner shift operator which admits a factorization involving quantum dilogarithms analogous to the results of Faddeev and Volkov.Comment: 14 pages, Plain TeX; typos and a terminological mishap corrected; version to appear in Lett.Math.Phy

Large-Scale Dryland Cropping Systems

This study was conducted from 2008 to 2015 at the Kansas State University Southwest Research-Extension Center near Tribune, Kansas. The crop rotations evaluated were continuous grain sorghum (SS), wheat-fallow (WF), wheat-corn-fallow (WCF), wheat-sorghum-fallow (WSF), wheat-corn-sorghum-fallow (WCSF), and wheat-sorghum-corn-fallow (WSCF). All rotations were grown using no-till practices except for WF, which was grown using reduced-tillage. Precipitation capture efficiency was not greater with more intensive rotations. Wheat yields were not affected by length of rotation. Corn and grain sorghum yields were about 60% greater when following wheat than when following corn or grain sorghum. Grain sorghum yields were almost twice as great as corn in similar rotations. The most profitable cropping system was wheat-sorghum-fallow